One-pot synthesis of formic acid hydrolysis-oxidation of potato starch in the presence of cesium salts of heteropoly acid catalysts
Solid bifunctional catalysts based on cesium salts of V-containing heteropoly acids (CsHPA: Cs 3.5 H 0.5 PW 11 VO 40 , Cs 4.5 H 0.5 SiW 11 VO 40 , Cs 3.5 H 0.5 PMo 11 VO 40 ) and Cs 2.5 H 0.5 PMo 12 O 40 were used for studying one-pot hydrolysis-oxidation of potato starch to formic acid at 413-443 K...
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Veröffentlicht in: | RSC advances 2020-08, Vol.1 (48), p.28856-28864 |
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Hauptverfasser: | , , , , , , , , |
Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | Solid bifunctional catalysts based on cesium salts of V-containing heteropoly acids (CsHPA: Cs
3.5
H
0.5
PW
11
VO
40
, Cs
4.5
H
0.5
SiW
11
VO
40
, Cs
3.5
H
0.5
PMo
11
VO
40
) and Cs
2.5
H
0.5
PMo
12
O
40
were used for studying one-pot hydrolysis-oxidation of potato starch to formic acid at 413-443 K and 2 MPa air mixture. It was shown that the optimum process temperature that prevents formic acid from destruction is 423 K. The studies were focused on the influence of the composition of heteropoly anions on the yield and selectivity of formic acid. Using W-V-P(Si) CsHPA results in the product overoxidation compared to Mo-V-containing CsHPA. The activity of Cs-PMo was significantly lower compared to Cs-PMoV. This may indicate that vanadium plays an important role in the oxidation process. The most promising catalyst was Cs
3.5
H
0.5
PMo
11
VO
40
which provided the maximum yield of formic acid equal to 51%. Cs
3.5
H
0.5
PMo
11
VO
40
was tested during nine cycles of starch hydrolysis-oxidation to demonstrate its high stability and efficiency.
Influence of composition of catalysts based on heteropoly acid cesium salts on formic acid production
via
starch hydrolysis-oxidation was investigated. |
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ISSN: | 2046-2069 |
DOI: | 10.1039/d0ra05501h |